is a specific kind of: unskilled person.

is a broader term that covers: abecedarian | apprentice, learner, prentice | cub, greenhorn, rookie | landlubber, landsman, lubber | entrant, fledgeling, fledgling, freshman, neophyte, newbie, newcomer, starter | tenderfoot | trainee.

derivation: begin, commence, get, get down, set about, set out, start, start out | induct, initiate.